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AR15.COM
7/17/2013 5:44:35 PM EDT
Will a colt half moon BCG work in any upper?
7/18/2013 5:48:46 AM EDT
[#1]
Yes, any 556 upper.
7/18/2013 7:28:09 AM EDT
[#2]
Quote History
Quoted:
Yes, any 556 upper.
View Quote


or 300 blackout upper

or .223 upper
7/19/2013 6:21:07 AM EDT
[#3]
Thanks, I thought it was just a semi auto.
7/19/2013 8:21:24 PM EDT
[#4]
You cannot use the half circle carrier in an auto, as it won't trip the auto sear. They will work in any upper, but function will be semi auto only...

Mick